Heater



Mayl 3, 1927.

H.V.DEEMAR HEATER Filed May 51, 1924 Patented May 3, 1927.

UNITED STATES HENRY v. DEEMAR, or sT. LOUIS, MISSOURI, YAssIofNOIi. 'roJOHN II. `IaIaUriIirGA,

I TRUSTEE, or'sir. LOUIS, MISSOURI.`

HEATER.-

This invention relates to heaters, and more particularly to heaterswhich may operate with gas fuel and the like for heating rooms orbuildings.

One of the objects of this invention is to providea heater which will beeconomical in the matter of fuel consumption and which may provideapositive air circulation there-` through for heating the air; v

Another Objectis to provide fsuch a heater' of novel design which maybe: adapted to heat a considerable quantity of air in a short time. Y

Another object is to provide such a heater in lwhich a considerableextent of heating surface may be heated by a single flame and whichheating surface isbrought into intimatecontact with the air to; beheated.

Further Objects will appear from the detail description taken inconnection with the accompanying drawing,.in,whicli: y

Figure 1 is a vertical sectionshowing a heater embodyingthis invention;

Figure 2 is a section on line 2 2, Figurel; j 4 i Figure 3 is a sectionon line 33-3, Figure l; .and f j i Figure 4 is` a fragmentaryviewshowing lanother embodiment of this inyention. v Referring to theaccompanying drawing, 1 .designatesa central airtube which is`surrounded by a second tube 2 formlngtherebetween an annular combustionchamber 3. f These tubes may be constructed of suitable sheet metal andsupported relatively tojone j another as will presently be pointed out.

The tube 1 fits at its lower` end into a casting 4 provided with a rimoreflange 5l adapted toreceive thetube 2 and properly space the samefrom the tube 1. The casting 4 is further provided with an -outer flange6 spaced from the flange 5 by suitable webs 7 and providing between themand the` flange 5 achamber 8 communicating through suitable openings 9with the interiorofthe tubel. The lower end ofthe tube 1 below thecasting 4 is adapted to be connected to the outlet tube' 10 of a`suitable fan or blowerll.

The casting 4 maybe provided with a` connection 12 suitableforattachment with` a suitable mixer 13 for supplying a mixture 'of airand gas to the combustion chamber'l 3. A suitable pilot 14 may also beconnected with the gas'supply and arranged for iguiting the gas in thecombustion chamber. A series ofairsupplytubes 15 ismounted chamber 8and` extend a substantial distance into the combustion chamber Thesetubesl are annular-ly f arranged as .shown in Figure PAT- FFIC'E., Y L

r`in the casting 4 sot as topass through the 3 and serve to supply airtothe combustion -1 chamber.VV described in Patent No. 1,341,266,ygranted May 25,1920. f f

The gas Vmixture entering at the connection 12 is `ignited within thechamber 3 4and burns with the flame which travels upwardly along saidchamber.V The mixture as ,supplied by thev mixer 13 comprisesacertainproportion of air sufficient to cause com-V bustion.` The tubes15, however, supply an The mixer 13 may be such as additionalquantity ofair at the point where combustion begins `or .attheoriginof the flame.This point is beyondth'egpoint" of entrance of the combustible mixture.Thus the flamey ispsuppliednat its origin .with a plantiful quantity ofair sol that a. rapid combustion is promoted and a long flame produced.This flame. travels upwardly along the chamber 3 to practically theyfull extent of saidl chamber, .heating thevtubes 1 andA 2 to a hightemperature.

The upper end of the combustionlchamber 3 is 4closed bya plate16provided "witha flange 17 to receive the tube 1 and an outer flange 18Vto receivetheftube 2in order to i properly space the tubes from oneanother. VThe plate is perforated with an annular series ofperforationszintoeach lof which a short tube 19 is spun. The upper endsof the tubes 19 are similarly'spun into perfora-V tions in the'lowerVplate 2O of a hood 21 adapted for connection with'a suitable flue 22.Afdamper 231nayfbe supplied in the flue 22 if desired. Passage is thusprovided for the burnt gases from the chamber 3 ythrough the tubes 19 tothehood 21, thence tOfh flue 22. f Y

Theouter flange (Siof thecasting 4 may be provided with a shoulderadapted to re ceive an outer .tube 24 surrounding thevrtube ,2 andproviding an air jacket .therearound The upper end of the tube 24terminates in a flared lip 25 just below the plate 16 and is `spacedfrom the tube 2 by a series of wings 26 formed onthe flangeV 18 buthaving .spaces therebetween to permitithe passage OffairV out of thetube 24. The outward flare of the lip-*'25 providesa horizontally lnoflame has been started the blower 11 is set into operation so as to blowair upwardlyi through the tube 1. This air passes out at the outlet frombeneath the `.hood E21 bythe spaces between the tubes 19. Thus an amplesupply of1air is passed upwardly throughthe tube11 so as to keep Athesame from overheating,- and the air I thus heated passes fout-y wardly 1in a horizontal direction-'between lthepipes 1-9 andbelowthe lowerjiilatefZO.-y

A` certain amount oftheair suppliedby they blower"11-also finds its'waythrough the openings y9a and :upwardly Within Ithe jacket 24 a`nd=out atthe-upper outlet thereof, falso in a horizontal direction.

n zontal outward flow of the air fromY between the "tubes -19 alsotendsto'rcreate asuction 'at *the'outletofjthe jacket 24 lso as Vtoassist in Iprovidinga draft of air; through said:

jacket;

' passedfthroughlthe heater Vand over 'the heating-.surfaces and rapidlydischarged into fm the'room.'y Theupward draft of air in the tubelserves to operate the atomizer nozzle ,27 so as yto supply a suitablequantity' of moisture to 'the'heated air;

In jthe embodiment/shown intFigure4 4 av Isimple ring 29 provided iiiplace ofv the in said rings"y Thel jacket 24 isspacedfrom the tube ,2kby means of afseries of spacers 3() fxedto the tube'in 'anyjsuitjablemanner .manner as that previously'described,.but in this case the draft'of aii'lthroughthe jacket @24"i`s set up Yby. induction rather thanA thepressure of the blower.

lt will vbe evident, therefore, thatlthis .invention provides `a simpleand effective` :heater in which a burner is provided-fwhich fmwilllieatthe entire lengtlifbf thejtubes 1 and 2` andwhich is provided withan ample. draft'ot air passing over these tubes so as to take up the'heattherefro'm and prevent their overheating.

ing surfacesrmay be'operated at a higher temperature than when -oiilynatural draft depart-ing from thespirit of this invention;

it is, therefore, to be understood that'I this invention is not to belimited to the specific *details shown andI described.

abovethe fp oint 'means H i This: serves to -take=upfthe heatofthe-outer tubeQ` so as f to -preventoverheatingv thereof;A The; hori-IThusaii amplequantityof air is I By means of such a heater a Llargefquantity ot air can'be heated in a comparatively short time since' thelieat- Having thus describedthe invention, what 4is claimed is:

1A heater comprising, a `casing adapted to torni an`T annulanchamber,means for supplying aV combustible mixture to said chamber, and ductsentering and extending 'into said chamber and adapted to admit air intothe flame beyond the entrance of the combustible f mixture.

2, A heater comprising, a casing adapted to form an annular chamberyineansior supplying' aV combustible mixture yto 'the bottom of saidchamber, andtubesfenteiinglthe bottom of and extending upintofsaid-chamber and=-adapted= to admitwair into Vtheflame otentranceof said supplying 3. "A heater comprising, a casingadapted to form anannulari combustionchai'nbei",` means for supplying' i a combustibleimixtuire to series" of :iii-ducts extending' into-*and directed alongsaid chamber and-terminatsupplying means, adaptedto Jldeliver` air tothe `flame beyonch said p'oint of entrance. F'

4. VA heater' comprisingya casing adapted to form' airaniiular'combustion chamber, means for supplying a coifnbustible-mixture to saidchamber Aat oneA end ithereoi,f and -a series of air ductsextendingfinto land directedalong said `-chamber and f terminatinglbeyond, the

.point ofentrance ofsaid supplyin'gfmeans, the `'mo uths of said ductsform-ing points of .origin for the flame. casting 4 .andrthe tubesl aremountedk 5'. A heater comprising', a vertica'lzair tube surrounded by acasing to form'lanfannular lcombustion chamber, means for supplying acombustib-le mixture to thebottomfofs'aid surrounded byy a casing toforiiran annular combustion chamber, means for supplying a combustiblemixture 'to @the bottoni of said chamber,v ducts entering.theibottoinfofand extending" into said' chamber and adapted to admit airintoztheiilameat its origimand Vmeans for forcing"airlthrough said tube.

lll)

7 A heater comprising, a vertical airtube Y surroundedby' a casing toform an annular combustion chamber, .means for supplyinv a combustiblemixture tothebottom of sai chamber, ducts entering thebotto'ilijof. and

'extendinginto saidlchainber andH adapted l to admit air into the flameat a point beyond Ythe entrance of the combustibleinixture, an airjacket surrounding said jcasing, and

'means for forcing air through saidftube and said jacket. Y j

8. 'A heater comprising,` a verticaltube having an air inlet at oneendlilid. an, air outlet at its other end,- a casing surround? 9. Aheater com risinfr a vertical tube havingl an air inlet at one end andan air outlet at its other end, a easing surrounding said tube to 'forman annular combustion chamber, an open air aeketsurrounding said easing,and a blower adapted for forcing air through said tube and said jacketto prevent overheating of Said easing.

10. A heater comprising, a tube surrounded by a easing to form anannular' chamber, n'ieans for supplying a combustible mixture to saidchamber, and a series of tubes annular-1y arranged amilV adapted toConnect said chamber with a ue, the spaces between said tubes providingan outlet for said` tube. Y t v 1l. A heater Comprising, a casingadapted to form an annular chamber, means for supplying a combustiblemixture to the lower` part of said chamber, and duets entering saidchamber and terminating above the bottom 25 thereof.l adapted to supplyair to the flame at its origin above the bottom of. said chamber. Y Intestimony whereof` I aix my signature Y this 25th( day ol April, 1924.

HENRY V. DEEMAR.

